1. Find a kite school or a professional instructor near you. Take lessons. Learn safe, learn fast.
2. Have them look at your gear. They can spot things like wear and tear you need to worry about
3. Sell AT LEAST one of the 10m kites and two of the harnesses. No need for all the junk.

Since I am morbidly curious and a bit if a masochist, what gear exactly do you have?